Bats, as nocturnal flying mammals, navigate efficiently in complete darkness with the help of their amazing sonar; able to notice every echo and ultrasound inaudible by the human ears. This book help us identify about 85 % if bat acoustic records in Europe, with a fantastic DVD including numerous audio examples to illustrate the methods as well as scatter diagrams for the identification of the emitting species.

Written during two decades of constant research on the subject by two experts and pioneers on bat sonar – Michel Barataud and Yves Tupinier.

The book shows us computer analysed ultrasounds and contains interesting discussions on which types of techniques we can use at home to identify the species (such as bat detectors etc.) With very good diagrams and photos in color.